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- ;;; -*- Mode:Emacs-Lisp -*-
-
- ;; Runtime support for the new optimizing byte compiler.
- ;; By Jamie Zawinski <jwz@lucid.com>.
- ;; Last Modified: 12-jun-92.
- ;;
- ;; The code in this file should always be loaded, because it defines things
- ;; like "defsubst" which should work interpreted as well. The code in
- ;; bytecomp.el and byte-optimize.el can be loaded as needed.
- ;;
- ;; This should be loaded by loadup.el or startup.el. If you can't modify
- ;; those files, load this from your .emacs file. But if you are using
- ;; emacs18, this file must be loaded before any .elc files which were
- ;; generated by the new compiler without emacs18 compatibility turned on.
- ;; If this file is loaded, certain emacs19 binaries will run in emacs18.
- ;; Meditate on the meanings of byte-compile-generate-emacs19-bytecodes and
- ;; byte-compile-emacs18-compatibility.
-
-
- ;; Copyright (C) 1985, 1986, 1987, 1992 Free Software Foundation, Inc.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-
- ;; emacs-18 compatibility.
-
- (if (fboundp 'make-byte-code)
- nil
- ;;
- ;; To avoid compiler bootstrapping problems, this temporary uncompiled
- ;; make-byte-code is needed to load the compiled one. Ignore the warnings.
- (fset 'make-byte-code
- '(lambda (arglist bytestring constants stackdepth doc)
- (list 'lambda arglist doc
- (list 'byte-code bytestring constants stackdepth))))
- ;;
- ;; Now get a compiled version.
- (defun make-byte-code (arglist bytestring constants stackdepth
- &optional doc &rest interactive)
- "For compatibility with Emacs19 ``.elc'' files."
- (nconc (list 'lambda arglist)
- ;; #### Removed the (stringp doc) for speed. Because the V19
- ;; make-byte-code depends on the args being correct, it won't
- ;; help to make a smarter version for V18 alone.
- ;; Btw, it should have been (or (stringp doc) (natnump doc)).
- (if doc (list doc))
- (if interactive
- (list (cons 'interactive (if (car interactive) interactive))))
- (list (list 'byte-code bytestring constants stackdepth)))))
-
-
- ;;; interface to selectively inlining functions.
- ;;; This only happens when source-code optimization is turned on.
-
- ;; Redefined in byte-optimize.el.
- (fset 'inline 'progn)
- (put 'inline 'lisp-indent-hook 0)
-
-
- ;;; Interface to inline functions.
-
- (defmacro proclaim-inline (&rest fns)
- "Cause the named functions to be open-coded when called from compiled code.
- They will only be compiled open-coded when byte-compile-optimize is true."
- (cons 'eval-and-compile
- (mapcar '(lambda (x)
- (or (memq (get x 'byte-optimizer)
- '(nil byte-compile-inline-expand))
- (error
- "%s already has a byte-optimizer, can't make it inline"
- x))
- (list 'put (list 'quote x)
- ''byte-optimizer ''byte-compile-inline-expand))
- fns)))
-
-
- (defmacro proclaim-notinline (&rest fns)
- "Cause the named functions to no longer be open-coded."
- (cons 'eval-and-compile
- (mapcar '(lambda (x)
- (if (eq (get x 'byte-optimizer) 'byte-compile-inline-expand)
- (put x 'byte-optimizer nil))
- (list 'if (list 'eq (list 'get (list 'quote x) ''byte-optimizer)
- ''byte-compile-inline-expand)
- (list 'put x ''byte-optimizer nil)))
- fns)))
-
- ;; This has a special byte-hunk-handler in bytecomp.el.
- (defmacro defsubst (name arglist &rest body)
- "Same syntax as defun, but the defined function will always be open-coded,
- so long as byte-compile-optimize is true."
- (list 'prog1
- (cons 'defun (cons name (cons arglist body)))
- (list 'proclaim-inline name)))
-
- (defun make-obsolete (fn new)
- "Make the byte-compiler warn that FUNCTION is obsolete,
- and NEW should be used instead. If NEW is a string, then that is the
- `use instead' message."
- (interactive "aMake function obsolete: \nxObsoletion replacement: ")
- (let ((handler (get fn 'byte-compile)))
- (if (eq 'byte-compile-obsolete handler)
- (setcar (get fn 'byte-obsolete-info) new)
- (put fn 'byte-obsolete-info (cons new handler))
- (put fn 'byte-compile 'byte-compile-obsolete)))
- fn)
-
- (defun make-obsolete-variable (var new)
- "Make the byte-compiler warn that VARIABLE is obsolete,
- and NEW should be used instead. If NEW is a string, then that is the
- `use instead' message."
- (interactive
- (list
- (let ((str (completing-read "Make variable obsolete: " obarray 'boundp t)))
- (if (equal str "") (error ""))
- (intern str))
- (car (read-from-string (read-string "Obsoletion replacement: ")))))
- (put var 'byte-obsolete-variable new)
- var)
-
- (put 'dont-compile 'lisp-indent-hook 0)
- (defmacro dont-compile (&rest body)
- "Like progn, but the body will always run interpreted (not compiled).
- If you think you need this, you're probably making a mistake somewhere."
- (list 'eval (list 'quote (if (cdr body) (cons 'progn body) (car body)))))
-
-
- ;;; interface to evaluating things at compile time and/or load time
- ;;; these macro must come after any uses of them in this file, as their
- ;;; definition in the file overrides the magic definitions on the
- ;;; byte-compile-macro-environment.
-
- (put 'eval-when-compile 'lisp-indent-hook 0)
- (defmacro eval-when-compile (&rest body)
- "Like progn, but evaluates the body at compile-time. The result of the
- body appears to the compiler as a quoted constant."
- ;; Not necessary because we have it in b-c-initial-macro-environment
- ;; (list 'quote (eval (cons 'progn body)))
- (cons 'progn body))
-
- (put 'eval-and-compile 'lisp-indent-hook 0)
- (defmacro eval-and-compile (&rest body)
- "Like progn, but evaluates the body at compile-time as well as at load-time."
- ;; Remember, it's magic.
- (cons 'progn body))
-
-
- ;;; Interface to file-local byte-compiler parameters.
- ;;; Redefined in bytecomp.el.
-
- (put 'byte-compiler-options 'lisp-indent-hook 0)
- (defmacro byte-compiler-options (&rest args)
- "Set some compilation-parameters for this file. This will affect only the
- file in which it appears; this does nothing when evaluated, and when loaded
- from a .el file.
-
- Each argument to this macro must be a list of a key and a value.
-
- Keys: Values: Corresponding variable:
-
- verbose t, nil byte-compile-verbose
- optimize t, nil, source, byte byte-compile-optimize
- warnings list of warnings byte-compile-warnings
- Legal elements: (callargs redefine free-vars unresolved)
- file-format emacs18, emacs19 byte-compile-emacs18-compatibility
- new-bytecodes t, nil byte-compile-generate-emacs19-bytecodes
-
- For example, this might appear at the top of a source file:
-
- (byte-compiler-options
- (optimize t)
- (warnings (- free-vars)) ; Don't warn about free variables
- (file-format emacs19))"
- nil)
-